Affinity web surfing with Google Chrome- Browse for a good cause

Google is marketing its web browser, Chrome, with an extension where your web surfing and usage of the browser can support a list of causes. The Google Chrome blog does an excellent job in simply describing the campaign:

Starting today, we invite you to support five worthy causes by counting and “donating” the tabs you open in Chrome.

Everyone’s total tabs will determine a charitable donation made on behalf of the Chrome community, up to one million dollars. Here’s what your tabs can do:
10 tabs = 1 tree planted
10 tabs = 1 book published and donated
25 tabs = 1 vaccination treatment provided
100 tabs = 1 square foot of shelter built
200 tabs = 1 person’s clean water for a year
To find out more about this effort and the organizations we’re partnering with, visit google.com/chrome/intl/en/p/cause/.